[runtime] Adding more detailed error message for Object::GetMethod.

src/messages.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 160 matching lines @@
   T(ObserveNonObject, "Object.% cannot % non-object")                          \
   T(ObserveNotifyNonNotifier, "notify called on non-notifier object")          \
   T(ObservePerformNonFunction, "Cannot perform non-function")                  \
   T(ObservePerformNonString, "Invalid non-string changeType")                  \
   T(ObserveTypeNonString,                                                      \
     "Invalid changeRecord with non-string 'type' property")                    \
   T(OrdinaryFunctionCalledAsConstructor,                                       \
     "Function object that's not a constructor was created with new")           \
   T(PromiseCyclic, "Chaining cycle detected for promise %")                    \
   T(PropertyDescObject, "Property description must be an object: %")           \
-  T(PropertyNotFunction, "Property '%' of object % is not a function")         \
+  T(PropertyNotFunction,                                                       \
+    "'%' returned for property '%' of object '%' is not a function")           \
   T(ProtoObjectOrNull, "Object prototype may only be an Object or null: %")    \
   T(PrototypeParentNotAnObject,                                                \
     "Class extends value does not have valid prototype property %")            \
   T(ProxyDeletePropertyViolatesInvariant,                                      \
     "Trap 'deleteProperty' returned true but property '%' is not configurable" \
     " in the proxy target")                                                    \
   T(ProxyHandlerNonObject, "Cannot create proxy with non-object as handler")   \
   T(ProxyHandlerReturned, "Proxy handler % returned % from '%' trap")          \
   T(ProxyHandlerTrapMissing, "Proxy handler % has no '%' trap")                \
   T(ProxyHandlerTrapMustBeCallable,                                            \
@@ skipping 321 matching lines @@
   static MUST_USE_RESULT MaybeHandle<String> GetStringifiedProperty(
       Isolate* isolate, LookupIterator* property_lookup,
       Handle<String> default_value);
 
   List<Handle<JSObject> > visited_;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_